Drill for wells



(No Model.) 2 Sheets-Sheet 1.

- G. E. WYMAN.

DRILL FOR WELL S, &c. 4 No. 519,012. Patented May 1, 1894.

2 Sheets-Sheet 2.

(No Model.)

G. E. WYMAN.

DRILL FOR-WELLS, 4w.

' Patented' May I 1894.

FIG .4-

complete, from one side of the same.

UNITED STATES PATENT OFFICE.

CHARLES E. WYMAN, OFiMARTINSBURG, INDIANA.

'DRILL FOR WELLS, 86C- SPEGIFICATION forming part of Letters Patent No.519,012, dated May 1, 1894.

Application filed October 31, 1892. $erial No. 450,522. (No model.)

- State of Indiana, have invented a new and useful Drill for Wells andMineral Prospecting, of which the following is a specification. Thisinvention relates to drills for well boring and mineral prospecting; andit has for its object to provide an improvement in drills of thischaracter wherein the points thereof form an integral part of thedrilling. tube, and at the same time is so constructed and connectedwith such tube as to not only possess great efficiency in drilling orreaming, but at the same time it is especially durable and inexpensive,in that it forms a part of the drilling tube and avoids the necessity ofremoving and specially securing the same to the tubes when threads breakor wear. out on such tubes. I

To this end the invention primarily contemplates an improvedconstruction of drill, and an improved method for the manufacturethereof.

With these and many other objects in view which will readily appear asthe nature of the invention is better understood, the same consists inthe novel construction, combination and arrangement of parts hereinaftermore fully described, illustrated and claimed.

In the accompanying drawings:Figure 1 is a perspective View of myimproved drill Fi 2 is a similar view of the drill'from the op positeside thereof. Fig. 3 isa longitudinal secas the drilling of the holeadvances, and said.

thickened tube section A, terminates at the other end thereof in aslightly enlarged integral or welded steel drilling head B. As statedthe steel drilling head B, which forms the point or bit of the drill-iswelded into the iron body of the pipe A, so as to form an integral partthereof, and said enlarged head B has the projecting sides thereofrounded so that the hole shall be drilled or bored perfectly round. Oneedge or face of the head B, is flattened as at O, to form the straighttransverse cutting edge or point D, which forms the advance cutting edgefor the drill. The opposite side or face of the drill, directly oppositethe flattened side or face 0 is channeled or grooved deeply as at E, toform the opposite claw or chisel cutters F, which are at the oppositeedges of the channel or groove E. The said opposite claw or chiselcutters F, which necessarilycut in the wake of the advance cutting edgeD, serve to chisel off the edges of the opening formed by the edge D,and therefore cause the hole to be drilled perfectly round, therebyadapting the drill for use in entering sloping stones, where the oldstyle of drills without the lateral claw or chisel cutters will fail tomake an entrance. By this construction of drill a sharper point orcutting edge is more easily maintained as will be readily apparent tothose skilled in the art. The central hollow bore of the pipe A, isextended into an'escape orifice or perforation H, which opens at itslower end on the flattened face of the drill head, and provides meanswhereby the cuttings or drillings can be pumped into the drill shaft ortube and out of the well in the usual manner. It Will be furtherobserved by those skilled in the art that by terminating a section .ofpipe in a Welded steel point, great advantage over the ordinary drillsis derived from the fact that in the event of the thread breaking orwearingout, the operator can readily cut off the defective thread andmake new threads with but little loss of time and without necessitatingthe removal of the drill point and sub: stituting another section ofpipe.

In manufacturing the herein described drill, the section of pipe A, isflared intoa bell shape at one end as at X, shown in Figs. 4 and 5 Theflared end X, of the pipe receives the extended rounded shank or stem Y,of the rectangular block of steel Z, which is'solid throughoutits lengthand forms the stock from which the specific shape of the drill point isturned. After shaping one end of the pipe, and the steel stock with astem as described, the steel stem is introduced into the flared mouth ofthe pipe end, and the joint thus made subjected to a welding heat sothat the steel stock can be welded into the pipe end and the pipe endonto the steel stock, so that for all practical purposes they formintegral parts of each other. As clearly shown in Fig.4 of the drawings,the rounded shank or stem Y, is materially less in its diameter or widththan the body of the block Z, from which it projects, so that the flaredend X, of the pipe will fit onto the shoulder at the base of said shankor stem, and is sufficiently wide to come out flush with the sides ofthe block Z, whereby, during the process of welding the two partstogether, the said flared end of the pipe can be easily worked off evenwith the enlarged block. This specific construction of the two members,to be welded together, forms a solidly constructed drill which, duringthe manufacture thereof, presents no snperfluons metal to be worked of,while at the same time being completely finished after welding, with theexception of forming the cutting portions thereof. Now having completedthe head of the pipe, by shaping and turning in the usual manner, thesteel head is shaped into. the form described, and the escape orifice orperforation drilled out, thereby entirely completing the drill hereindepicribed, which possesses the advantages speci- Fig. 4 illustrates thepipe and the steel stock separated and Fig. 5 shows the two weldedtogether preparatory to shaping the point of the drill. It may befurther observed at this point that the solid block of steel Z, is of arectangular shape so that the same is of a greater width than thediameter of the tube or pipe section A, and, even after the welding ofthe two parts together, retains this same greater width, so that thedrill cutting edges can be properly out therefrom without weakening thestrength of the drill at its cutting end. Therefore, by reason of theshape of this block and the greater relative size of the same withrespect to the pipe A, the construction of the stock just describedrenders the same only available for use in the manufacture of a drill ofthe character claimed.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is

In a drill for wells or mineral prospecting, the combination of a pipeor tube section terminating at one end in a solid integral drill orcutter head provided at one side with a flattened face, beveled at itslower end to form a straight transverse cutting edge D, a channel orgroove formed longitudinally in the side or base oppositesaid flattenedside and having its opposing outer edges beveled to form opposite sideclaw cutters adapted to follow in the wake of the straight transversecutting edge, said opposing side claw cutters having a clear spacethere-between formed by said channel, and an escape orifice orperforation piercing the flattened side of the head opposite to thechannel or groove and communicating with the interior of the pipe ortube, substantially as set forth.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in the presence of two witnesses.

CHARLES E. WYMAN.

Witnesses:

WILLIS G. HETI-I, OHAs. B. ELLIs.

